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Evaluation of stability after pre-orthodontic orthognathic surgery using cone-beam computed tomography: A comparison with conventional treatment

Authors
 Hye-Rim Ann  ;  Young-Soo Jung  ;  Kee-Joon Lee  ;  Hyoung-Seon Baik 
Citation
 Korean Journal of Orthodontics (대한치과교정학회지), Vol.46(5) : 301-309, 2016 
Journal Title
 Korean Journal of Orthodontics  (대한치과교정학회지) 
ISSN
 1225-5610 
Issue Date
2016
Abstract
Objective : The aim of this study was to evaluate the skeletal and dental changes after intraoral vertical ramus osteotomy (IVRO) with and without presurgical orthodontics by using cone-beam computed tomography (CBCT). Methods : This retrospective cohort study included 24 patients (mean age, 22.1 years) with skeletal Class III malocclusion who underwent bimaxillary surgery with IVRO. The patients were divided into the preorthodontic orthognathic surgery (POGS) group (n = 12) and conventional surgery (CS) group (n = 12). CBCT images acquired preoperatively, 1 month after surgery, and 1 year after surgery were analyzed to compare the intergroup differences in postoperative three-dimensional movements of the maxillary and mandibular landmarks and the changes in lateral cephalometric variables. Results : Baseline demographics (sex and age) were similar between the two groups (6 men and 6 women in each group). During the postsurgical period, the POGS group showed more significant upward movement of the mandible (p < 0.05) than did the CS group. Neither group showed significant transverse movement of any of the skeletal landmarks. Moreover, none of the dental and skeletal variables showed significant intergroup differences 1 year after surgery. Conclusions : Compared with CS, POGS with IVRO resulted in significantly different postsurgical skeletal movement in the mandible. Although both groups showed similar skeletal and dental outcomes at 1 year after surgery, upward movement of the mandible during the postsurgical period should be considered to ensure a more reliable outcome after POGS.
Files in This Item:
T201605570.pdf Download
DOI
10.4041/kjod.2016.46.5.301
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
2. College of Dentistry (치과대학) > Dept. of Oral and Maxillofacial Surgery (구강악안면외과학교실) > 1. Journal Papers
Yonsei Authors
백형선(Baik, Hyoung Seon)
이기준(Lee, Kee Joon) ORCID logo https://orcid.org/0000-0002-0782-3128
정영수(Jung, Young Soo) ORCID logo https://orcid.org/0000-0001-5831-6508
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URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/152886
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